108109979 has 2 divisors, whose sum is σ = 108109980. Its totient is φ = 108109978.

The previous prime is 108109957. The next prime is 108110003. The reversal of 108109979 is 979901801.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-108109979 is a prime.

It is not a weakly prime, because it can be changed into another prime (108109909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54054989 + 54054990.

It is an arithmetic number, because the mean of its divisors is an integer number (54054990).

Almost surely, 2^108109979 is an apocalyptic number.

108109979 is a deficient number, since it is larger than the sum of its proper divisors (1).

108109979 is an equidigital number, since it uses as much as digits as its factorization.

108109979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 44.

The square root of 108109979 is about 10397.5948661217. The cubic root of 108109979 is about 476.3819096218.

The spelling of 108109979 in words is "one hundred eight million, one hundred nine thousand, nine hundred seventy-nine".